Machine and method for automatically doffing and donning

ABSTRACT

DURING THE CONTINUOUS TRAVEL OF A HEAD 35 ALONG A SPINNING FRAME, FILLED BOBBINS 10 ARE DOFFED UPWARDLY SUCCESSIVELY AND EMPTY BOBBINS ARE DONNED ONTO THE SPINDLES. OTHER MECHANISMS CARRIED BY THE HEAD OPERATE IN PRECISELY TIMED RELATION TO CATCH EACH DOFFED BOBBIN (FIG.26), TRANSFER IT LATERALLY (FIG. 28) WHILE MAINTAINING THE UNWOUND THREAD AB OF THE DOFFED BOBBIN UNBROKEN AND UNDER POSITIVE CONTROL DURING STRIPPING OF THIS THREAD UPWARDLY OFF FROM THE SPINDLE, LAYING A SHORT LENGTH OF THE TRAVELER END PORTION OF THIS THREAD AROUND THE BASE OF THE EMPTY SPINDLE AND SEVERING OF THE THREAD BETWEEN THE SPINDLE BASE AND THE DOFFED BOBBIN AS AN EMPTY BOBBIN IS DONNED ONTO THE SPINDLE THUS GRIPPING THE TRAVELER END BETWEEN THE SPINDLE BASE AND BOBBIN BUTT. AFTER THE SEVERING, THE UNWOUND THREAD OF THE DOFFED BOBBIN IS ELEVATED ABOVE THE NOSE OF THIS BOBBIN AND, DURING THE LATERAL TRANSFER OF THE BOBBIN, A LENGTH OF THIS   THREAD ADJACENT THE DOFFED BOBBIN IS TUCKED DOWNWARDLY INTO THE HOLE IN THE BOBBIN, THE REMAINING LENGTH CUT OFF AND DISCARDED.

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MACHINE AND METHOD FOR AUTOMATICALLY DOFFING AND DONNING Filed Nov. 10.1966 24 Sheets-Sheet 18 M/Vf/VTOF.

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